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Air carrier with similar sounding call sign took clearance intended for another aircraft with identical numbers, resulting in less than standard separation with another air carrier.
| Attributes | |
| ACN | 113760 |
| Time | |
| Date | 198906 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ape |
| State Reference | OH |
| Altitude | msl bound lower : 31000 msl bound upper : 32300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 19 |
| ASRS Report | 113760 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 18 |
| ASRS Report | 113365 |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : clearance non adherence : far non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 15000 vertical : 1300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The aircraft involved were air carrier X and air carrier Y. I was working air carrier X at FL290 ord to dca at the ape hi sector. The pilot requested to deviate south of J30 and climb to FL330 for thunderstorms east of the ape VOR. Air carrier X was cleared to deviate south of course for WX and was climbed to FL330. The crw hi controller was working air carrier Y dca to day at FL310. He also was working air carrier Z with a similar call sign which he advised both pilots of. I became busy and had a tracker move into ape hi to help me. His first action was to point out air carrier X climbing to FL330 to crw hi and deviating for WX which was approved. We later received a handoff on air carrier Y atl FL310 and asked the crw hi controller to descend air carrier Y to FL240. He gave air carrier Y the clearance however air carrier Z took the clearance by mistake. In the meantime I tried to turn air carrier X to the east 080 degree to clear air carrier Y but the pilot would not turn because of the WX. I also tried to turn air carrier X to the southwest (240 degree) but the pilot advised he could not as he was between 2 thunderstorms. Supplemental information from acn 113365: air carrier Y issued descent clearance to avoid air carrier X and air carrier Z read back clearance. Air carrier Y was then told to descend (no answer). Air carrier Y told to descend (no answer). Air carrier Y told to descend again, finally acknowledges clearance.
Original NASA ASRS Text
Title: ACR WITH SIMILAR SOUNDING CALL SIGN TOOK CLRNC INTENDED FOR ANOTHER ACFT WITH IDENTICAL NUMBERS, RESULTING IN LESS THAN STANDARD SEPARATION WITH ANOTHER ACR.
Narrative: THE ACFT INVOLVED WERE ACR X AND ACR Y. I WAS WORKING ACR X AT FL290 ORD TO DCA AT THE APE HI SECTOR. THE PLT REQUESTED TO DEVIATE SOUTH OF J30 AND CLIMB TO FL330 FOR TSTMS E OF THE APE VOR. ACR X WAS CLRED TO DEVIATE S OF COURSE FOR WX AND WAS CLIMBED TO FL330. THE CRW HI CTLR WAS WORKING ACR Y DCA TO DAY AT FL310. HE ALSO WAS WORKING ACR Z WITH A SIMILAR CALL SIGN WHICH HE ADVISED BOTH PLTS OF. I BECAME BUSY AND HAD A TRACKER MOVE INTO APE HI TO HELP ME. HIS FIRST ACTION WAS TO POINT OUT ACR X CLIMBING TO FL330 TO CRW HI AND DEVIATING FOR WX WHICH WAS APPROVED. WE LATER RECEIVED A HANDOFF ON ACR Y ATL FL310 AND ASKED THE CRW HI CTLR TO DSND ACR Y TO FL240. HE GAVE ACR Y THE CLRNC HOWEVER ACR Z TOOK THE CLRNC BY MISTAKE. IN THE MEANTIME I TRIED TO TURN ACR X TO THE E 080 DEG TO CLEAR ACR Y BUT THE PLT WOULD NOT TURN BECAUSE OF THE WX. I ALSO TRIED TO TURN ACR X TO THE SW (240 DEG) BUT THE PLT ADVISED HE COULD NOT AS HE WAS BETWEEN 2 TSTMS. SUPPLEMENTAL INFORMATION FROM ACN 113365: ACR Y ISSUED DSCNT CLRNC TO AVOID ACR X AND ACR Z READ BACK CLRNC. ACR Y WAS THEN TOLD TO DSND (NO ANSWER). ACR Y TOLD TO DSND (NO ANSWER). ACR Y TOLD TO DSND AGAIN, FINALLY ACKNOWLEDGES CLRNC.
Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.